Lock.



PATENTED AUG. 2, 1904.

F. M. THOMPSON.

LOCK.

APPLICATION FILED MAR. 24, 1904.

3 SHEETSSHEET 1.

N0 MODEL.

LE n .I

PATENTBD AUG. 2, 1904.

F. M. THOMPSON.

LOOK.

urmonxon rum) um. 24, 1904.

3 SHEETS-SHEET 2.

N0 MODEL.

PATENTED AUG. 2, 1904.

I. M. THOMPSON.

LOCK.

APPLIUATION FILED MAR. 24, 1904.

E M a w 7 Q m IVE)... 0 s 0 1L 7 & u 1 I: o I 2 1 2 N0 MODEL.

35 the door.

Patented August 2, 1904.

FREDERICK M. THOMPSON, OF DANBURY, CONNECTICUT.

LOOK.

SPECIFICATION forming part of Letters Patent No. 766,472, dated August 2 1904.

Application filed March 24, 1904. Serial No. 199,689. No modelfi To LZZ wit/nit it HZ/ Ly concern.-

Be it known that I, FREDERICK M. TiioMrsoN, a citizen of the United States, residing at Danbury, county of Fairfield, State of Con- 5 necticut, have invented a new and useful Lock,

of which the following is a specification.

My invention has for its object to produce a lock adapted for general use, and especially adapted for use upon the doors of stores and I0 public buildings where it is desirable that certain persons should have the privilege or duty of unlocking the door, but not of looking it, that others should have the privilege or duty of locking it. but not of unlocking it,

and that still other persons should have the key and both unlocking and locking, No. .2

having the power of unlocking only, and No. 3 the power of locking only.

As an illustration of the operation of my novel lock, suppose in the case of a store or public building that it is necessary that certain clerks, employees, or occupants have the power to effect an entrance at any time, but that it is extremely undesirable, as in the case of stores, that they have the privilege of en- 0 tering it outside of business hours. The proprietors, the managers, and such persons as they choose to trust have No. 1 keys, which enable them to enter and leave the building at any time, as they can both unlock and lock An employee or employees whose duty it is to open the building are provided with No. 2 keys. This enables them to unlock the door, but compels them to stay there after it has once been unlocked or else to notit'y a person having a key that will lock the door. As there is always some person whose duty it is to close the building at night after all others have left it, this person is provided with a No. 3 key, which enables him to lock the building, but does not permit him to un,

lock it. By providing employees of a store with No. 2 or No. 3 keys in accordance with the requirements of their duties the owner or manager 18 assured that these duties may be attended to without inconvenience and is also assured that there will be no entrance of the store except at the proper times, as the person who unlocks the door must remain until others come or notify a person havingalocking-key, as he will be unable himself to lock the door.

\Vith these and other objects in view I have devised the novel lock which 1 will now describe, referring to the accompanying drawings, forming a part of this specification, and using reference characters to indicate the several parts.

Figure 1 is a plan view, the face-plate of the case being removed, illustrating a form of the invention in which a single tumbler is provided with both unlock and lock stopsthat is, a stop that is engaged by a No. Zkey to prevent locking therewith and a stop that is engaged by a No. 3 key to prevent unlocking therewith-the bolt being in the retracted position; Fig. 2, a detail sectional view on the line indicated by 2 in Fig. 1, illustrating the act of locking or unlocking with a No. 1 key; Fig. 3, a detail view illustrating the act of unlocking with a No. Qkey and in dotted lines the position of the tumbler when an attempt is made to throw the bolt with a No. 2 key; Fig. i, a detail view illustrating the act of locking with a No. 3 key and in dotted lines the position of the tumbler when an attempt is made to retract the bolt with a No. 3 key; Fig. 5, a perspective of the single tumbler in this form of the invention detached; Fig.

6, an inverted plan view of the tumbler detached; Fig. 7, a plan view with the faceplate removed, illustrating a form of the invention in which the unlock and lock stops adapted to be engaged by No. 2 and No. 3 keys, respectively, as before, are formed on independent tumblcrs, the bolt being in the retracted position; Fig. 8, a perspective of the tumblers in Fig. 7 detached; Fig. 9, a detail sectional view similar in character to Fig. .2, but corresponding with the form of lock in Fig. 7, illustrating the act of looking or unlocking with a N0. 1 key; Fig. 10, a similar view illustrating the act of unlocking with a No. 2 key and in dotted lines the position of the unlock-stop on one of the tumblers when an attempt is made to throw the bolt with aNo. 2 key; Fig.11, asimilar view illustrating the act of looking with a No. 3 key and in dotted lines the position of the lockstop on one of the tumblers when an attempt is made to retract the boltwith a No. 3 key; Fig. 12, a plan View with the face-plate removed, illustrating a form of the invention in which independent tumblers are provided with recesses the effect of which is to so place the tumblers that stops thereon will be engaged by an abutment on the bolt to prevent looking with a No. 2 key and to prevent unlocking with a No. 3 key, the bolt being in the act of being thrown or retracted by a No. 1 key; Fig. 13, a detail sectional view on the lineindicated by 13 in'Fig. 12, illustrating the act of locking or unlocking with a No. 1 key; Fig. 14, a detail plan view illustrating the action of the unlock-stop on one of the tumblers when an attempt is made to throw the bolt with a No. 2 key; Fig. 15, a detail View showing the normal position of the tumblersthat is, when the bolt is either thrown or retracted; Fig. 16, an inverted plan view of the tumbler corresponding with Fig. 15; Fig. 17, a detail plan view corresponding with Fig. 14, illustrating the action of the lockstop on one of the tumblers when an attempt is made to retract the bolt with a No. 3 key;

Fig. 18, a detail sectional View similar in.

character to Fig. 10, but corresponding with the form of lock in Figs. 12 to 17, inclusive, illustrating the act of unlocking with a No. 2 key and in dotted lines the position of the unlock-stop on one of the tumblers when an attempt is made to throwthe bolt with a No. 2 key; and Fig. 19 is a View similar in character to Fig. 11, illustrating the act of locks ing with a No. 3 key and in dotted lines the position of the lock stop on one of the tumblers when an attempt is made to retract the bolt with a N o. 3 key.

2O denotes a lock-case, and 21 a bolt having a recess 38, the opposite sides of which are respectively engaged by a projection on a key in throwing or retracting the bolt. It will be obvious, however,that the special style of the case and of the bolt are of no importance so far as the principle of the invention is concerned.

22 denotes a key which will both throw and retract the bolt and which for convenience I have termed the No. 1 key; 23, a key that will retract the bolt, but will not throw it,

. and which for convenience I have termed the spring 27, which bears against the tumbler and against an abutment 28 upon the case. The tumbler is also provided with a lug 29, which is engaged by a lug 30 on the 'bolt to prevent the bolt from being thrown except when the tumbler is lifted by a No. 1 or a No. 3 key or retracted except when the tumbler is lifted by a No. 1 or a No. 2 key.

The essential feature of the several forms of the invention is that I provide stops upon the tumbler or tumblers which may be engaged by the keys or by a stump on the bolt to prevent the bolt from being retracted except by a N0. 1 or a No. 2key and to prevent it from being thrown except by a No. 1 or a No. 3 key. In the form of the invention illus trated in Figs. 1 to 6, inclusive, these stops are both formed upon tumbler 25. 31 indicates a stop upon the tumbler which I term the unlock-stop, for the reason that it retains the bolt in the retracted or substantially the retracted position against a No. 2 key, which can only unlockthat is, retract the boltand 32 indicates a stop upon the tumbler which I term the lock-stop, for the reason that it retains the bolt in the thrown or substantially the thrown position against a No. 3 key, which can only lockthat is, throw the bolt. It will be noted that these stops are abrupt shoulders facing each other and that back of the stops are inclines, (indicated, respectively, by 33 and 34.) These inclines pass into notches in the bits of thekeys, as will presently be fully explained. Between the stops is a groove or passage 7 6, which receives one of the projections on the bits of the keys.

Turning now to Fig. 2, the essential features of a N o. 1 key, which I have indicated by 22 for this form of the invention, are recesses 35 at the end of the bit, on opposite,

sides thereof, which permit the key to pass stop 32 upon the tumbler in the act of unlocking, projections 36, which enter .groove 7 6 in the tumbler and by engaging the bottom of said groove lift the tumbler in the act of locking or unlocking and also engage the wall of recess 38 in the bolt to throw or retract the bolt, and a recess 37 between .projections 36, which permits the key to pass stop 31 on the tumbler in the act of looking,

it beingunderstood, of course, that one of the recesses 35 and one of the projections 36 are operative when the key is inserted from one side of the door, the other recess 35 and projection 36 being operative when the key is inserted from the other side of the door. In operating a N o. 1 key, therefore, to throw the bolt the tumbler is lifted by the engagement of one of the projections 36 with the bottom of groove 76. Recess 37 permits the key to pass stop 31 freely, andthe other projection 36 engages the forward wall of recess 38 in the bolt and moving along said wall throws the bolt. The instant the bolt is thrown lug 29 on the tumbler drops down behind lug 30 on the bolt and locks the latter at the thrown position. In retracting the bolt the operation is the same except that the rear wall of recess 38 in the bolt is engaged by the projection on the bit of the key to retract it.

The No. 2 key, which is an unlocking-key only and which I have indicated by for this formof the invention, (see Fig. 3,)ditl'ers from the No. 1 key in the omission of recess 37. The recesses on the opposite sides of the bit are the same as before; but as there is a continuous projection between these recesses I will indicate that projection by 39. In retracting the bolt with a No. 2 key incline 33 on the tumbler is engaged by projection 39 to raise the tumbler. One of the recesses 35 permits the key to pass stop 32, and projection 39 engages the rear wall of recess 38 in the bolt and retracts it. The instant the bolt is retracted lug 29 on the tumbler drops down before lug 30 on the bolt and locks the latter at the retracted position, as in Fig. 1. Any attempt to throw the bolt with this key, however, is thwarted through the engagement of projection 39 on the key with stop 31 on the tumbler. (See dotted lines, Fig. 3.)

The No. 3 key, which is a locking-key only and whichl have indicated by 2% for this form of the invention, (see Fig. 4,) differs from the No. 1 key in the omission of recesses 35. The recess 37 at the center of the bit is the same as in the No. 1 key; but as the projections on the opposite sides of this recess extend to the sides of the bit I will indicate those projections by ii). In throwing the bolt with a No. 3 key incline 34: on the tumbler is engaged by one of the projections 40 to raise the tumbler. The recess 37 permits the key to pass stop 31, and one of the projections I0 engages the forward wall of recess 38 in the bolt and throws it. The instant the bolt is thrown lug 29 on the tumbler drops down behind lug 30 on the bolt and locks the latter at the thrown position. Any attempt to retract the bolt with this key, however, is thwarted through the engagement of one of the projections 40 on the key with stop 32 on the tumbler. (See dotted lines, Fig. 4.)

In Figs. '7 and S I have illustrated the application of the principle of the invention to a form of lock having two or more tumblers. In the present instance I have shown three tumblers, although but two are required to carry out the principle of the invention, the intermediate tumbler merely performing the ordinary function of guarding the boltthat is, retaining it in either the thrown or retracted position. These tumblers are all pivoted on a stud 26, as in the other form, and are retained in operative position by springs 41, one end of each spring being connected to a tumbler and the other end bearing againstan abutment 4:2 on the case.

form are provided with openings 4:3. 4:4 and denote, respectively, upper and lower projections extending into the openings from opposite sides at the mid-length of the openings. The upper and lower projections on each tumbler are of different lengths, there being between the projections on each tumbler a neck or passage 6 just wide enough to permit a stump at? on the bolt to pass freely in throwing or retracting the bolt, the bolt being locked in the thrown or retracted position by the engagement of the front or rear ends of the stump with the projections, as indicated in Fig. 7, in which the bolt is shown in the retracted position. As soon, however, as an attempt is made to throw the bolt without raising the tumblers to the proper heights, respectively, to permit the stump to pass through the necks the stump will engage the projections and lock the bolt against further movement, the operation being precisely the same when the bolt is in the thrown position except that the stump will lie in front of the projections instead of behind them, as in Fig. 7. For convenience in illustration I will indicate the upper tumbler as they appear in the drawings by 48, the intermediate tumbler by 49, and the lower tumbler by 50. In this form the unloclvstop that is. the stop that retains the bolt in the retracted or substantially the retracted position againsta No. 2 key, which can only unlockthat is, retract the bolt and which I have indicated by 51- is on tumbler L3, and the lock-stop-that is, the stop that retains the bolt in the thrown or substantially the thrown position against a No. 3 key, which can only lock-that is, throw the bolt and which I have indicated by 52-is on tumbler 50. These stops are abrupt shoulders, as in the other form; but the corresponding inclines, which I have indicated, respectively, by 53 and 5 are in front of the stops instead of behind them, as in the other form. 55 indicates the No. 1 key for this form, 56 the No. 2 key, and 57 the No. 3 key. In this form of the invention the projections at the ends of the bits of the keys are indicated by 58 and are of the same height in the three keys. The central recess between these projections is, however, relatively deep in the No. 1 and No. 2 keys and relatively shallow in the No. 3 key. I therefore indicate the relatively deep central recesses of the No. 1 and No. 2 keys by 59 and the relatively shallow central recess of the No. 3 key by 60. The recesses at the ends of the bits on opposite sides thereof are relatively deep in the No. 1 and No. 3 keys and relatively shallow in the No. 2 key. I therefore indicate the relatively deep end recesses of the N o. l and No. 3 keys by 61 and the relatively shallow end recesses of the No. 2 key by 62. In operating a N o. 1 key in this form to throw the bolt tumbler a8 is raised by the engagement therewith of the bottom of one of the The tumblers in this i recesses 61 in the key, tumbler 19 is raised by with the bit of the key.

the engagement therewith of one of the projections 58, and tumbler is raised by the engagement therewith of the bottom of recess 59 in the key, and the bolt is moved forward by the engagement of the other projection 58 on the bit of the key with the forward wall of the recess 38 in the bolt. As soon as the bolt commences to move forward stump 47 on the bolt will pass into the necks or passages 46 between the upper and lower projections on the tumblers, so that when the bit of the key in its forward movement comes into alinement with unlock-stop 51 on tumbler 48 said tumbler will be retained in the raised position by the engagement of the end of the upper projection thereon with the top of stump 47, thus retain'i'ngsaid unlock-stop out of engagement As soon as the bolt is thrown by the forward movement of the key the tumblers will drop down again and the bolt will be locked in the thrown position by the upper projections on the tumblers, which will drop down behind it. 7 In retracting the bolt the operation is the same except that the rear wall of recess 38 in the bolt is engaged by the projection on thebit of the key to retract it, tumbler 50 being retained at the raised position through the engagement of the end of the upper projection thereon with the top of stump 47 on the bolt,'-whieh retains the lockstop out of engagement with the bit of the key. The No. 2 key for this form of the invention, which is an unlocking-key only and which I have indicated by 56,(see Fig. 10,) differs from the No. 1 key only in that relatively shallow end recesses 62 are substituted for the relatively deep end recesses 61 of the No. 1 key. In retracting the bolt with a No. 2 key the operation is precisely the same as with a No. 1 key. Any attempt to throw the bolt with this key, however, is thwarted through the engagement of the end of the bit of the key with unlock-stop 51. This engagement takes place just below the relatively shallow end recess 62, as is shown in dotted lines in Fig. 10. It must be understood that in the lock illustrated in Figs. 7 and 8 recesses at the ends of the bit on opposite sides thereof are required for the proper manipulation of the tumblers. The relative shallowness of the end recesses, however, in this form permits the metal below said recesses to serve, in effect, as projections which engage the unlockstop in an attempt to throw the bolt. The No. 3 key for this. form of the invention, which is a locking-key only and which I have indicated by 57, (see Fig. 11,) differs from the No. 1 key only in' that a relatively shallowcentral recess is substituted for the relatively deep central recess 59 of the No. 1 key. In throwing the bolt with a No. 3 key the operation is precisely the same as with a No. 1 key. Any attempt to retract the bolt with this key, however, is thwarted through the engagement of the end of the bit of the key with lock-stop 52. This engagement takes place just below the relatively shallow central recess 60, as indicated by dotted lines in Fig. 11, it being understood that in the lock illustrated central recesses at the ends of the bits of the keys are required for the proper manipulation of the tumblers. The relative shallowness of the central recess, however, in this form permits the metal below said recess to serve, in effect, as a projection, which engages the lock-stop in an attempt to retract the bolt.

In Figs. 12 to 19, inclusive, I have illustrated the application of the principle of the invention in a slightly-variant manner to a form of lock having two or more tumblers. In the present instance I have shown three tumblers, although but two are required to carry out the principle of the invention, the intermediate tumbler merely performing the ordinary-function of guarding the boltthat is, retaining it in either the thrown or retracted position. These tumblers are all pivoted on a stud 26, as in the other forms, are retained in operative position by springs 41, as in the second form, and are provided with openings 43, having upper and lower projections of varying length extending into the openings from opposite sides thereof. The bolt is provided with a recess 38, as in both of the other forms, and with a stump 47, as in the second form. For convenience in illustration I will indicate the upper tumbler as they appear in the drawings, by 63, the intermediate tumbler by 64, and the lower tumbler by 65. In this form the unlockstopthat is, the stop which retains the bolt in the retracted or substantially the retracted position against a No. 2 key, which can only unlockthat is, retract the boltis on theing in this form indicated by 63. Instead of providing a special stop for this purpose, however, as in the second form, the tumblers and the bits of the keys are so constructed and arranged relatively to each other that the upper projection on the upper tumbler, (indicated in the present instance by 44,) which extends into the opening 43, acts as the unlock-stopthat is, the stop that retains the bolt in the retracted or substantially the retracted position against a No. 2 key. The lockstopthat is, the stop that retains the bolt in the thrown or substantially the thrown position against a N o. 3 'key, which can only lockthat is, throw the bolt-is on the lower tumbler, as before, said tumbler being in this form indicated by 65. Instead of providing a special stop for this purpose, however, as in the second form, the tumblers and the bits of the keys are so constructed and arranged relatively to each other that the upper projection on the lower tumbler, (indicated in the present instance by 44k which extends into the opening 43, acts as the lock-stop that is, the stop that retains the bolt in the thrown or substantially the thrown position. 66 denotes the No. 1 key for this form. 67 the No. 2 key, and 68 the No. 3 key. In this form of the invention the projections at the ends of the bits of the keys are indicated by 69 and are of the same height in the three keys. The central recess between these projections is, however, relatively shallow in the No. 1 and No. 2 keys and relatively deep in the No. 3 key. I therefore indicate the relatively shallow central recesses in the No. 1 and No. 2 keys by T0 and the relatively deep central recess in the No. 3 key by T1. The recesses at the ends of the bit on opposite sides thereof are relatively shallow in the No. 1 and No. 3 keys and relatively deep in the No. 2 key. I therefore indicate the relatively shallow end recesses of the N0. 1 and No. 3 keys by 72 and the relatively deep end recess of the No. 2 key by '73. It will of course be obvious that the engaging surfaces of the tumblers and the corresponding engaging surfaces of the bits of the keys must be shaped to correspond with each other in order to produce the desired result. In the present instance .1 have shown tumbler 63 as provided with a curved depression H in its engaging surface lying back of or substantially back of the lower projection 45 and have shown tumbler as provided with a similar curved depression T5, lying forward or substantially forward of the lower projection 15. In this form the operation of the No. 1 key in throwing and retracting the bolt, the operation of the No. 2 key in retracting the bolt, and the operation of the No. 3 key in throwing the bolt is precisely the same as in the form last described. The tumblers are all raised by the bits of the keys just sufficiently to place the necks or passages 16 between the projections on the tumblers in alinement with stump *7 on the bolt, so that said stump can pass through them in either direction as the bolt is moved forward or backward, the bolt being locked in both the thrown and retracted positions in the same manner as before. An y attempt to throw the bolt with a N o. 2 key, however, is thwarted through the engagement of stump at? on the bolt with unlock-stop 44 on tumbler 63, as clearly shown in Fig. 14. (See also Fig. 18.) This result is ktCCOlilPlisllOtl through the coaction of one of the relatively deep end recesses T3 in the No. 2 key (indicated by 67) with depression H in tumbler 63. The combined effect of the depression in the tumbler and the recess in the key may or may not result in raising the tumbler slightly. The

essential feature, however, is that said tumbler 63 cannot be raised high enough by the No. 2 key in an attempt to throw the bolt to raise unlock-stop 4st on the tumbler above stump 17 on the bolt, so that in the forward movement of the bolt the stump will positively engage this stop, which will elfectuall y lock the bolt against further forward movement. In'retracting the bolt, however, with a No. 2 key the bottom of one of the recesses 73 in the key will engage the under side of the tumbler in front of depression 74 and the tumbler will be raised just sufficiently to permit stump 4:7 to pass through the neck or passage Ifi between the projections in openings 43 in the tumblers.

Any attempt to retract the bolt with a No. 3 key is thwarted through the engagement of stump =17 on the bolt with lock-stop 44" on tumbler 65, as clearly shown in Fig. 17. (See also Fig. 19.) This result is accomplished through the coaction of relatively deep central recess 71 in the No. 3 key, which is indicated by 68, with depression in tumbler 65. The combined effect of the depression in the tumbler and the recess in the key may ormay not result in raising the tumbler slightly. The essential feature, however, is that tumbler 65 cannot be raised high enough by the No. 3 key in an attempt to retract the bolt to raise lock stop +11" on the tumbler above stump +1? on the bolt, so that in the backward movement of the bolt the stump will positively engage this stop, which will effectually lock the bolt against further backward movement. In throwing the bolt, however, with a No. 3 key the bottom of the recess 71 in the key will engage the under side of the tumbler back of depression '75 and the tumbler will be raised just sufficiently to permit stump a? to pass through the neck or passage 16 between the projections in opening 43.

In each embodiment of the invention shown and described the keys which I have referred to as the No. 2 and the No. 3 key are what may be properly termed secondary keys, said two keys differing from each other and one being adapted to only project the bolt and the other being adapted to only retract the bolt after it has been projected. It will be also understood that in each form or embodiment of the invention the tumbler mechanism is provided with shoulders or detents which are out of alinement with each other, so that each of the differently and suitably bitted secondary keys will move the bolt in but one direction. In the form illustrated in Figs. 1 to 6 these shoulders or detents comprise the stops 31 and 32, in Figs. 7 and S such shoulders or detents comprise the stops 51 and 52, and in Figs. 12 to 19 said shoulders or detents comprise the projections 4A and 44.", which are left in or thrown out of the path of the stump -17 of the bolt. Of course the said projections 4e and 4A" are out of alinement with each other because they are carried by different tumblers.

Having thus described my invention, I claim l. The combination with a lock including a bolt and tumbler mechanism the latter provided with lock and unlock stops, of two secondary keys differing from each other, one for locking and the other for unlocking the bolt, substantially as described.

2. The combination With a lock including a bolt and tumbler mechanism the latter provided with lock and unlock stops, of tWo secondary keys differing from each other, one for locking and the other for unlocking the bolt, and a master-key for both locking and unlocking the bolt.

8. Ina lock, the combination of a bolt, tumbler mechanism therefor, said tumbler mechanism provided With-a shoulder or detent for engagement by a key to retract the bolt and a shoulder or detent for engagement by a key to project the bolt, said shoulders or detents being out of alinement With each other Whereby a suitably-bitted key Will only project said bolt, and a suitably-bitted second key Will only retract the bolt'.

4. In a lock, the combination of a bolt, tumbler mechanism therefor, said tumbler mechanism provided with. a shoulder or detent for engagement by a key to retract the bolt and a shoulder or detent for engagement by a key to project the bolt, said shoulders or detents being out of alinement With each other Whereby a suitablybitte :l key Will only project said bolt, and a suitablybittedsecond key will only retract the bolt, amaster-key beingprovided adapted to both project and retract the bolt.

5. In alock, the combination of a bolt, tumbler mechanism therefor said tumbler mechanism provided With a shoulder or detent for engagement by a key to retract the bolt and a shoulder or detent for engagement by a key to project the bolt, said shoulders or detents being out of alinement Witheach other, akey having a bit provided With projections and recesses and adapted to actuate the tumbler mechanism and to only project the bolt, and another key having a bit provided with dissimilar projections and recesses and adapted to actuate the tumbler mechanism and to only retract the bolt.

6. In a lock, the combination of a bolt, tumbler mechanism therefor said tumber mechanism provided with a shoulder or detent for engagement by a key to retract the bolt and a shoulder or detent for engagement by a key to project the bolt, said shoulders or detents being out of alinement With each other, a key having a bit provided With projections and recesses and adapted to actuate the tumbler mechanism and to only project the bolt, another key having a bit provided with dissimilar projections and recesses and adapted to actuate the tumbler mechanism to only retract the bolt, and a third or master key'having a bit provided With projections and recesses differing from both of the other keys and adapted to actuate the tumbler mechanism and to either project or retract the bolt.

In testimony whereof I aflix my signature in presence of tWo Witnesses.

FREDERICK M. THOMPSON.

itnesses:

SAMUEL TWEEDY, NORMAN C. BEERS. 

